how we measure memory. at the bottom of things a piece of digital information is always stored as a...
TRANSCRIPT
How We Measure Memory
At the Bottom of things
• A piece of digital information is always stored as a sequence of binary states.
What’s that mean you ask???
A microscopic view of a CD
Electrical Memory
• RAM, Memory Sticks, Memory Cards all store information as sequences of negative or neutral charges.
• The two states are negative and Neutral
A “bit”
A bit of information is a single binary state.
For example:
• “on” or “off”
• “pit” or “land”
• “negative” or “neutral”
“A Byte”
There are 8 bits in a byte.
A byte can hold a single character. Ex: ‘A’
A “Kilobyte” (Kb)
A Kilobyte is 1024 bytes or 210. (or about 1000 bytes)
You would measure an Email in Kb.
A Megabyte Mb
A megabyte is 1 048 576 bytes which is 220. (Or about 1 million Bytes)
Mp3s and digital pictures are usually 2-5 Mbs.
Gigabytes (Gb)
A Gigabyte is 1 073 741 824 bytes or 210 or about 1 billion bytes.
We measure RAM, Hard drives, Memory cards in Gb.
Summary1.A bit is a single binary state.
2.There are 8 bits in a byte
3.There are about 1 000 bytes in a Kilobyte.
4.There are about 1 000 Kilobytes in a Megabyte
5.There are about 1 000 Megabytes in a Gigabyte
6.There are about 1 000 Gigabytes in a Terabyte